package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.security.PrivateKey;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
@Transactional
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper ;
    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    public void saveWithFlavor(DishDTO dishDTO ){

        log.info("新增菜品");
        Dish dish =new Dish();
        BeanUtils .copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper .insert(dish);
        Long dishId=dish.getId();
        //向口味表插入n条数据
        List<DishFlavor > flavors =dishDTO .getFlavors() ;
        if(flavors!=null && flavors.size()>0){
            flavors .forEach(dishFlavor ->
            {
                dishFlavor .setDishId(dishId);
            }) ;
            /**
             * 批量插入口味数据
             */
            dishFlavorMapper .insertBatch(flavors);
        }

    }
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO ) {
        PageHelper.startPage(dishPageQueryDTO .getPage() , dishPageQueryDTO .getPageSize());
        Page<DishVO> page= dishMapper .pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal() , page.getResult());
    }
    /**
     * 菜品批量删除
     * @param ids
     * @return
     */
    @Override
    @Transactional
   public void deleteBatch(List<Long> ids){
        //判断当前菜品是否嗯能够删除--是否存在起售中的菜品
        for(Long id:ids){
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant .ENABLE ){
                throw new DeletionNotAllowedException(MessageConstant .DISH_ON_SALE );
            }
        }
        //判断当前菜品是否被套餐关联--是否被套餐关联了
       List<Long> setmealIds= setmealDishMapper .getSetmealIdsByDishIds(ids);
        if(setmealIds !=null && setmealIds .size() >0){
            throw new DeletionNotAllowedException(MessageConstant .DISH_BE_RELATED_BY_SETMEAL  );
            //菜品被关联
        }
        //删除菜品表中的菜品数据
        /*for(Long id:ids){
            dishMapper .deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper .deleteByDishId(id);
        }*/

        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //根据菜品id集合批量删除关联的口味数据
        dishFlavorMapper .deleteByDishIds(ids);
//sql:delete from dish where id in ()



    }
    /**
     * 根据id查询对应的菜品和口味
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id){
        //根据id查询菜品数据
        Dish dish=dishMapper .getById(id);

        //根据id查询口味数据
        List<DishFlavor >  dishFlavors =dishFlavorMapper .getByDishId(id);

        DishVO dishVO =new DishVO();
        BeanUtils .copyProperties(dish,dishVO );
        dishVO .setFlavors(dishFlavors );
        return dishVO ;
    }
    /**
     * 根据id修改菜品基本信息和对应的口味信息
     * @param dishDTO
     */

    public void updateWithFlavor(DishDTO dishDTO){
        Dish dish =new Dish();
        BeanUtils .copyProperties(dishDTO ,dish);
        //修改菜品表基本信息
        dishMapper .update(dish);

        //删除原有的叩微信息
        dishFlavorMapper .deleteByDishId(dishDTO .getId() );
        //重新插入新的口味信息
        List<DishFlavor > flavors =dishDTO .getFlavors() ;

        if(flavors!=null && flavors.size()>0){
            flavors .forEach(dishFlavor ->
            {
                dishFlavor .setDishId(dishDTO .getId() );
            }) ;
            /**
             * 批量插入口味数据
             */
            dishFlavorMapper .insertBatch(flavors);
        }
    }
    /**
     *
     * 根据菜品分类查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> getByCategoryId(String categoryId){
        List<Dish> dishList=dishMapper  .getByCategoryId(categoryId);
        return dishList;
    }
    /**
     * 启用、禁用菜品
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        dishMapper .update(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
